/r/NetflixBestOf is not an archive. Reposts are not only allowed, but are encouraged to some extent. The front page of this subreddit is meant to be a living representation of quality content on Netflix and you might see the same submissions multiple times. The mods are leaving it up to the community to utilize downvotes if they feel that reposts are too excessive. Stop complaining about reposts and stop messaging the mods about it. If the same title appears simultaneously in the top 50, it may be removed at the mod's discretion.